<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .s1{
            width:70%;
            height: 51%;
            margin: auto;
        }
        .s2{
            
            width:40%;
            margin:auto;
            text-align: center;
            font-size: 20px;
            padding: 0;
            background-color: black;
            position: absolute;
            top:46%;
            left:30%;
        }
        
        a{
            display: inline-block;
            width: 80px;
            height: 30px;

            text-align: center;
            /* 竖直居中，建议配合line-height使用，与height的值一致 */
            line-height: 30px;
            /* 内边距 */
            padding: 10px;
            
            text-decoration: none;
            color: white;
        }
        a:hover{
            color:black;
            background-color: white;

        }
        
    </style>
</head>

<body>
    <div class="s1">
        <img src="./img/sf.png"/>
    </div> 
    <div class="s2"> 
            <a href="#" target="_self" >查询快递</a>
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</body>
</html>